Trolley pole



Feb. 25, 1930. M. BERGSTRCM TROLLEY POLE Filed May 15, 1929 p Patented e 25, "1930 y UNITED s ITEs GUNNAB IBERGSTROMQOFV maxnnsronm', rnimsrnvnn'ra V v 'rnonnnnronri} Applicationefiled. May 13,1 29}; geish meta;

. 1o wi'th'the conventional trolleylpole'supporting mechanism. I a v The foregoing and other objects together with means whereby the same may be carried into efiect will best be understood'from the'following description of a preferredembodiment of the ivention taken in connection with the accompanying, drawing wherein Figure 1 is a side view of my invention in ,.use. v I

Figure 2 is an enlarged plan view of my t invention. 7 v

Figure 3 is an'enlargedsectionalongthe line 33 in Figure 2. I

-Referring now more'particularly to the 5 drawing the reference character A denotes a trolley pole supporting mechanism rotatably V mounted upon the roof B of a car and having f the springs one of which is shown at adapted to normally elevate the trolley pole andmaintain the current collector or trolley wheel Din engagement with the trolley wire 7 E. The foregoing elements are of conven tional formandiI make no claim therefor.

: vIn accordance with the invention I pro 235 vide a trolley wheelhousing 1 and a coupling or swivel 2 adapted to be mounted upon the A freeend of'the'trolleypole 3 in a manner to be described. The wheel housing 1 is preferably though not necessarily circular in 4 cross-section and has at oneend the slot 41 in which is rotatably mounted the aforesaid trolley wheel D. "The coupling 2. is preferably tapered somewhat as shown-and isalso i v circular in cross section. One end 5 of the esr couplingo 2 has a longitudinally extended 4 y passageway 6 adapted to loosely receive the end 7 ofthe trolley pole 3 which end extends into avlaterally cut orextendedaperture 8 in the coupling, the said aperture bein spaced from the end 5 as shown The trollaterally cut aperture in one end adapted "to liearea- 11sa li gs are ny T nected ,by'Qa bol t 9 which" passes-through the said coupling andfthe pole adj'acentthe passageway Bf springs IlOjfa're' secured :by one. endiat 1 1 withinllthefapeiture 8 upon either side or. theehd' I lofjthe p016 and engage the'safid'pole'tonorinally hold the cou-' nng in "axial alignment? therewith. The 5 other ends ofthe wheel housing l-and cou- I j pling 2;are provided with passageways 12 ".60; and 13 which communicate with apertures 1 1 and 15 similar to the passageway 6 and aperture 8 just described. A bolt 16 passes through the passageways 12 and 13 and nutscg 17 are secured upon the ends of this bolt within the apertures 14 and 15thus connect} ing the said housing and coupling and per mitting the former to rotate A slot 18 is a provided in the end face of the housing 1 a and a lug 19 isprovided upon the adjacent '7 end face of the coupling 2, the said lug 19 engaging the slot 18 to limit the rotation of the said housing.

In use the trolley wheel D is allowed to freely and easily follow any curve or other variation of the trolley wire E since the coupling 2and housing 1 may swing laterally with respect to'the pole'3'or the'said housing 1 may rotate somewhatupon the said coupling; The leaf springs 10 are suificiently strong to normally maintain the coupling 2 in alignment with the pole 3 yet they allow the trolley wheel to follow the slightest inequality of the trolley wire without turning the supporting mechanism A as will be unv derstood. g I d While I have herein set forth a certain preferred embodiment of my invention it is understood that I may vary fromthe same in 7 minor structural details, not departing from' the spirit of the invention and within the scope of the appended claims. v I claim: a I I 1. In a device of the character described, a trolley pole, a trolley wheel housing having" a slot in its upper end,,a trolley wheel mounted in the slot, a coupling having a longitudinally extended passageway and a receive the end of the trolley pole, the said coupling being pivoted on the trolley pole,

leaf springs mounted in the said aperture in engagement with the end of the trolley pole, the said Wheel housing and coupling having longitudinally extended passageways and laterally cut apertures in their meeting ends,

teXfis ed th qug th pas age 111110 the said apertures -gij ts upon thef endspfithe bolt, the said Wheel housing having also a slot in its end face and a lug upon the end of the said coupling-.a;dapte;d.te-playimthesaidslot c 2. In a device of the character described, a trolley pole, a trolley Wheel housing -a trolley Wheel journaled inthehousing a coupling rotatably connected to the said housins mean :i lim ting... h rotati n Q th s housi g t, ela iv LE th .cqup ng th said.couplin ;ha ingape sag yl cr qe v th said tr lley p le and e ng p e tther a d q or s liently h d ng-the said co pling I 1 al gnme wi h th o rQ1l y,.p9ls* I 

